12 C.F.R. § 1030.4
(2) Requests.
(ii) In providing disclosures upon request, the institution may:
(b) Content of account disclosures. Account disclosures shall include the following, as applicable:
(ii) Variable rates. For variable-rate accounts:
(3) Balance information—(i) Minimum balance requirements.
(A) Any minimum balance required to:
(1) Open the account;
(2) Avoid the imposition of a fee; or
(3) Obtain the annual percentage yield disclosed.
(6) Features of time accounts. For time accounts: